Air filter



FIG. 1 is a perspective view of the air filter showing our new design;

FIG. 2 is a view of one side of our design, the opposite side being a mirror image thereof;

FIG. 3 is a view of one end of our design, the other end being a mirror image thereof;

FIG. 4 is a top view thereof; and,

FIG. 5 is a bottom view thereof. 

The ornamental design of the air filter, as shown and described. 